scholarly journals Serum Vitamin D Levels and Polycystic Ovary syndrome: A Systematic Review and Meta-Analysis

Nutrients ◽  
2015 ◽  
Vol 7 (6) ◽  
pp. 4555-4577 ◽  
Author(s):  
Chunla He ◽  
Zhoumeng Lin ◽  
Sara Robb ◽  
Amara Ezeamama
Keyword(s):  
Systematic Review ◽  
Vitamin D ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Meta Analysis ◽  
Serum Vitamin ◽  
Ovary Syndrome ◽  
Serum Vitamin D ◽  
Vitamin D Levels

scholarly journals Serum Vitamin D Levels in Fertile and Infertile Women with Polycystic Ovary Syndrome

2019 ◽  
Vol 79 (05) ◽  
pp. 510-516 ◽  
Author(s):  
Demet Kokanalı ◽  
Mujdegul Karaca ◽  
Gulnur Ozakşit ◽  
Burak Elmas ◽  
Yaprak Engin Üstün
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Serum Vitamin ◽  
Ovary Syndrome ◽  
Infertile Women ◽  
Serum Vitamin D ◽  
Vitamin D Levels ◽  
Fertile Women

Abstract Introduction In polycystic ovary syndrome, serum vitamin D levels are known to correlate with metabolic conditions such as diabetes mellitus, metabolic syndrome and cardiovascular disease. However, there are not enough studies showing such a relationship with female fertility. We aimed to compare serum vitamin D levels in fertile and infertile women with polycystic ovary syndrome to evaluate whether vitamin D may play a role in the pathogenesis of fertility problems in women with polycystic ovary syndrome. Materials and Methods 274 infertile and 111 fertile women with polycystic ovary syndrome were included in this retrospective study. Infertile and fertile groups were matched by age, body mass index and homeostasis model assessment of insulin resistance. Anthropometric, clinical and laboratory characteristics of the women were recorded. Serum 25(OH)D3 levels were used to assess serum vitamin D levels. Results No significant differences were detected between groups in terms of anthropometric, clinical and laboratory features except for serum 25(OH)D3 levels and the incidence of vitamin D deficiency. Vitamin D levels were significantly lower and vitamin D deficiency was more common in the infertile group compared to the fertile group. When the groups were stratified into obese/non-obese or insulin resistance positive/negative, infertile obese and infertile insulin resistance-positive women had the lowest serum 25(OH)D3 levels. Conclusion Serum vitamin D levels are lower in infertile women with polycystic ovary syndrome compared to fertile women. When insulin resistance or obesity was present, vitamin D levels were reduced further. Thus, in polycystic ovary syndrome, lower vitamin D levels may play a role in the pathogenesis of fertility problems.

scholarly journals The Role of Vitamin D Oral Supplementation in Insulin Resistance in Women with Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Nutrients ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1637 ◽  
Author(s):  
Karolina Łagowska ◽  
Joanna Bajerska ◽  
Małgorzata Jamka
Keyword(s):  
Systematic Review ◽  
Insulin Resistance ◽  
Vitamin D ◽  
Polycystic Ovary Syndrome ◽  
Fasting Glucose ◽  
Polycystic Ovary ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Ovary Syndrome ◽  
Randomized Controlled

Objective: To evaluate the effect of vitamin D supplementation (alone or with co-supplementation) on insulin resistance in patients with polycystic ovary syndrome (PCOS). Methods: We performed a literature search of databases (Medline, Scopus, Web of Knowledge, Cochrane Library) and identified all reports of randomized controlled trials (RCTs) published prior to April 2018. We compared the effects of supplementation with vitamin D alone (dose from 1000 IU/d to 60,000 IU/week) or with co-supplements to the administration of placebos in women diagnosed with PCOS. The systematic review and meta-analysis protocol was registered in the International Prospective Register of Systematic Reviews (Prospero) as number CRD42018090572. Main results: Eleven of 345 identified studies were included in the analysis; these involved 601women diagnosed with PCOS. Vitamin D as a co-supplement was found to significantly decrease fasting glucose concentrations and the HOMA-IR value. HOMA-IR also declined significantly when vitamin D was supplemented with a dose lower than 4000 IU/d. Conclusions: Evidence from RCTs suggests that the supplementation of PCOS patients with continuous low doses of vitamin D (<4000 IU/d) or supplementation with vitamin D as a co-supplement may improve insulin sensitivity in terms of the fasting glucose concentration (supplementation with vitamin D in combination with other micronutrients) and HOMA-IR (supplementation with vitamin D in continuous low daily doses or as co-supplement).

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